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Summary: Inherited Constants | Methods | Inherited Methods

# DocumentType

`public interface DocumentType`
`implements Node`

org.w3c.dom.DocumentType

Each `Document` has a `doctype` attribute whose value is either `null` or a `DocumentType` object. The `DocumentType` interface in the DOM Core provides an interface to the list of entities that are defined for the document, and little else because the effect of namespaces and the various XML schema efforts on DTD representation are not clearly understood as of this writing.

DOM Level 3 doesn't support editing `DocumentType` nodes. `DocumentType` nodes are read-only.

See also the Document Object Model (DOM) Level 3 Core Specification.

## Summary

### Inherited constants
From interface `org.w3c.dom.Node`
`short` | `ATTRIBUTE_NODE` The node is an `Attr`.
`short` | `CDATA_SECTION_NODE` The node is a `CDATASection`.
`short` | `COMMENT_NODE` The node is a `Comment`.
`short` | `DOCUMENT_FRAGMENT_NODE` The node is a `DocumentFragment`.
`short` | `DOCUMENT_NODE` The node is a `Document`.
`short` | `DOCUMENT_POSITION_CONTAINED_BY` The node is contained by the reference node.
`short` | `DOCUMENT_POSITION_CONTAINS` The node contains the reference node.
`short` | `DOCUMENT_POSITION_DISCONNECTED` The two nodes are disconnected.
`short` | `DOCUMENT_POSITION_FOLLOWING` The node follows the reference node.
`short` | `DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC` The determination of preceding versus following is implementation-specific.
`short` | `DOCUMENT_POSITION_PRECEDING` The second node precedes the reference node.
`short` | `DOCUMENT_TYPE_NODE` The node is a `DocumentType`.
`short` | `ELEMENT_NODE` The node is an `Element`.
`short` | `ENTITY_NODE` The node is an `Entity`.
`short` | `ENTITY_REFERENCE_NODE` The node is an `EntityReference`.
`short` | `NOTATION_NODE` The node is a `Notation`.
`short` | `PROCESSING_INSTRUCTION_NODE` The node is a `ProcessingInstruction`.
`short` | `TEXT_NODE` The node is a `Text` node.

### Public methods
`abstract NamedNodeMap` | `getEntities()` A `NamedNodeMap` containing the general entities, both external and internal, declared in the DTD.
`abstract String` | `getInternalSubset()` The internal subset as a string, or `null` if there is none.
`abstract String` | `getName()` The name of DTD; i.e., the name immediately following the `DOCTYPE` keyword.
`abstract NamedNodeMap` | `getNotations()` A `NamedNodeMap` containing the notations declared in the DTD.
`abstract String` | `getPublicId()` The public identifier of the external subset.
`abstract String` | `getSystemId()` The system identifier of the external subset.

### Inherited methods
From interface `org.w3c.dom.Node`
`abstract Node` | `appendChild(Node newChild)` Adds the node `newChild` to the end of the list of children of this node.
`abstract Node` | `cloneNode(boolean deep)` Returns a duplicate of this node, i.e., serves as a generic copy constructor for nodes.
`abstract short` | `compareDocumentPosition(Node other)` Compares the reference node, i.e.
`abstract NamedNodeMap` | `getAttributes()` A `NamedNodeMap` containing the attributes of this node (if it is an `Element`) or `null` otherwise.
`abstract String` | `getBaseURI()` The absolute base URI of this node or `null` if the implementation wasn't able to obtain an absolute URI.
`abstract NodeList` | `getChildNodes()` A `NodeList` that contains all children of this node.
`abstract Object` | `getFeature(String feature, String version)` This method returns a specialized object which implements the specialized APIs of the specified feature and version, as specified in .
`abstract Node` | `getFirstChild()` The first child of this node.
`abstract Node` | `getLastChild()` The last child of this node.
`abstract String` | `getLocalName()` Returns the local part of the qualified name of this node.
`abstract String` | `getNamespaceURI()` The namespace URI of this node, or `null` if it is unspecified (see ).
`abstract Node` | `getNextSibling()` The node immediately following this node.
`abstract String` | `getNodeName()` The name of this node, depending on its type; see the table above.
`abstract short` | `getNodeType()` A code representing the type of the underlying object, as defined above.
`abstract String` | `getNodeValue()` The value of this node, depending on its type; see the table above.
`abstract Document` | `getOwnerDocument()` The `Document` object associated with this node.
`abstract Node` | `getParentNode()` The parent of this node.
`abstract String` | `getPrefix()` The namespace prefix of this node, or `null` if it is unspecified.
`abstract Node` | `getPreviousSibling()` The node immediately preceding this node.
`abstract String` | `getTextContent()` This attribute returns the text content of this node and its descendants.
`abstract Object` | `getUserData(String key)` Retrieves the object associated to a key on a this node.
`abstract boolean` | `hasAttributes()` Returns whether this node (if it is an element) has any attributes.
`abstract boolean` | `hasChildNodes()` Returns whether this node has any children.
`abstract Node` | `insertBefore(Node newChild, Node refChild)` Inserts the node `newChild` before the existing child node `refChild`.
`abstract boolean` | `isDefaultNamespace(String namespaceURI)` This method checks if the specified `namespaceURI` is the default namespace or not.
`abstract boolean` | `isEqualNode(Node arg)` Tests whether two nodes are equal.
`abstract boolean` | `isSameNode(Node other)` Returns whether this node is the same node as the given one.
`abstract boolean` | `isSupported(String feature, String version)` Tests whether the DOM implementation implements a specific feature and that feature is supported by this node, as specified in .
`abstract String` | `lookupNamespaceURI(String prefix)` Look up the namespace URI associated to the given prefix, starting from this node.
`abstract String` | `lookupPrefix(String namespaceURI)` Look up the prefix associated to the given namespace URI, starting from this node.
`abstract void` | `normalize()` Puts all `Text` nodes in the full depth of the sub-tree underneath this `Node`, including attribute nodes, into a "normal" form where only structure (e.g., elements, comments, processing instructions, CDATA sections, and entity references) separates `Text` nodes, i.e., there are neither adjacent `Text` nodes nor empty `Text` nodes.
`abstract Node` | `removeChild(Node oldChild)` Removes the child node indicated by `oldChild` from the list of children, and returns it.
`abstract Node` | `replaceChild(Node newChild, Node oldChild)` Replaces the child node `oldChild` with `newChild` in the list of children, and returns the `oldChild` node.
`abstract void` | `setNodeValue(String nodeValue)` The value of this node, depending on its type; see the table above.
`abstract void` | `setPrefix(String prefix)` The namespace prefix of this node, or `null` if it is unspecified.
`abstract void` | `setTextContent(String textContent)` This attribute returns the text content of this node and its descendants.
`abstract Object` | `setUserData(String key, Object data, UserDataHandler handler)` Associate an object to a key on this node.

## Public methods

### getEntities

    public abstract NamedNodeMap getEntities ()

A `NamedNodeMap` containing the general entities, both external and internal, declared in the DTD. Parameter entities are not contained. Duplicates are discarded. For example in:

    <!DOCTYPE
     ex SYSTEM "ex.dtd" [ <!ENTITY foo "foo"> <!ENTITY bar
     "bar"> <!ENTITY bar "bar2"> <!ENTITY % baz "baz">
     ]> <ex/>

the interface provides access to `foo` and the first declaration of `bar` but not the second declaration of `bar` or `baz`. Every node in this map also implements the `Entity` interface.
The DOM Level 2 does not support editing entities, therefore `entities` cannot be altered in any way.

Returns
`NamedNodeMap` |

### getInternalSubset

    public abstract String getInternalSubset ()

The internal subset as a string, or `null` if there is none. This is does not contain the delimiting square brackets.

Note: The actual content returned depends on how much information is available to the implementation. This may vary depending on various parameters, including the XML processor used to build the document.

Returns
`String` |

### getName

    public abstract String getName ()

The name of DTD; i.e., the name immediately following the `DOCTYPE` keyword.

Returns
`String` |

### getNotations

    public abstract NamedNodeMap getNotations ()

A `NamedNodeMap` containing the notations declared in the DTD. Duplicates are discarded. Every node in this map also implements the `Notation` interface.
The DOM Level 2 does not support editing notations, therefore `notations` cannot be altered in any way.

Returns
`NamedNodeMap` |

### getPublicId

    public abstract String getPublicId ()

The public identifier of the external subset.

Returns
`String` |

### getSystemId

    public abstract String getSystemId ()

The system identifier of the external subset. This may be an absolute URI or not.

Returns
`String` |

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